Friction-clutch.



No. 726.646. PATENTBD APB.. 2a, 1903.

' M. R. CONWAY.

PRIGTION CLUTCH.

APPLICATION FILED 00T. 6, 1902.

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M. R. CONWAY. y FRICTION GLUTGH. APPLICATION FILED 00T. 6, 1902.

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N0 MODEL.

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E Nonms Pctws cn. woroumo.. wAsHrNnTo rotatably mounted on shaft A5: C,annular UNITED STATES f PATENT OFFICE.

MICHAEL R. CONWAY, OF CINCINNATI, OHIO, ASSIGNOR TO THE KISINGER- ISONCOMPANY, OF CINCINNATI, IOHIO, A CORPORATION OF OHIO.

CLUTCH.

SPECIFICATION forming part 0f Letters Patent N 0. 726,646, dated April28, 1903.

Application liledvOvctober 6, 1902.

To @ZZ whom it 71u07/ concern:

Be it known that I, MICHAEL R. CONWAY, a citizen of theUnted States,residing at Cincinnati, in the county of`Hamiltonand State ofOhio, haveinvented certain newl and useful Improvements in- Friction Clutches, ofwhich the following is a specification.

The object of my invention is to provide an improved friction-clutch;and the invention consists in the combinations` and arrangements ofparts hereinafter described and claimed.

In the drawings, Figure lis a sectional elevation of directly andreversely .rotating pulleys equipped With clutches embodying myinvention; Fig.f2, a section on line 2 2'of Fig. l; Fig. 3, alongitudinal section of the coneshifter, and Fig. 4 a section on line 4;4 of- Fig. 3.

Reference-letter A denotes a vdriven shaft; B B, directly and reverselyrotating pulleys friction-flanges on pulleys B51), driving-hubs attachedto shaft A; E E', friction-straps engaging the outer and inner surfacesof flanges C; F, keys for applying strapsE and iE to flanges C, and G acone-shifter for operating keys F.

The shaft A and pulleys B are the usual shaft and pulleys fortransmitting direct and reverse motion to any desired mechanism. Each ofthe. pulleys `B is provided With a centrally-located liange C, havingvexternal and internal friction surfaces c and c, respectively. The hubsD may be of any desired constructiombut are preferably provided withflanges d, covering liange C and straps E and E'. At one end each pairof friction-straps E and E is provided Wit'h stops e, taking againstcorresponding stops d on flanges d; The stops c have their active sidesbeveled, as shown. A key F is mounted between the free ends of straps Eand E. This key has a lug f', bearing on lug e on the free end of strapE', and is provided with a lug f2, carrying a set-screw f3, bearingcentrally against lug e2 on the free end of strap E. v The lengths ofstraps E and'E' are such that they mustV be slightly sprung to lit inbetween their respective stops. This puts a slight spring in thesurfaces c and c'.

straps, tending to hold them from contact seria No. 126,229. (No model.)

ditions. The cone-shifter G is loosely mounted on hubs D and whenshifted to one side or the other serves to operate keys F to force 55the friction-straps E and E into contact with Collars a serve to holdthe pulleys in position.`

Inioperation pulleys B are constantly rotatedV by belts in oppositedirections. When 6o itis desired to impart the rotations of one pulleyto shaft A, the cone-shifter is shifted i toward that pulley, causingthe corresponding conical surface toengage the outer end .of key F torocktheA key in its bearings on straps E and E'. This rock of key Fcauses set-screw f3 to press against lug e2 on the end of strap E toapply it to surface c, and the reaction-from set-screw f3 is transmittedto the end vof friction-strap E through the bear- 7o ing of key Ftherein, thus causing an end thrust on strap E to expand it againstsurface c'. Since the actionl and reaction are always equal, thepressure applied to straps E and E must be equal. It Will be noted thatthe keyF is thus mounted in what may be called a floating bearing, theeffect of which is to automatically equalize the pressure of both strapsE and E on surfaces-c ando. The pull on strap Eand theend thrust-onstrap Etend 8o to cause the beveled'su'rfac'esof stopse to travel onstopsd', thus forcing theseends of the straps into closer contact withtheir respective surfaces, and the natural effect of the rock of key Fis to carry the free ends of the straps into closer con tact with theirrespective surfaces, so that a .uniform application of thestrapsthroughout their entire lengthsl is obtained. By means ofset-screwf3 the straps may be properly adjusted to their surfaces 9o andundue playdue to Wear taken up. When it is desired to remove shaft Afrom the domination of the pulley, the cone-shifter G is shifted back,thus permitting the keyto resume its idle position and the straps toWithdraw from contact with their surfaces, a'result which is facilitatedby a' lslight backward travel of straps e on their beveled sides,tending to withdraw the straps at that end.

It Will be noted thatthe application of the rou friction-pressure isradially and centrally of the pulley, thus obviating lateral ortorsional strains on shaft A, and that the take up of wear by means ofset-screw]c3 will maintain key F in a constant position.

While I have illustrated and described the preferred form ofapplication, this is' obviously capable of many variations Withoutdeparting from the spirit of my in vention. For instance, the frictionsurfaces c and c may be the external and internal surfaces of separateflanges instead of the same ange and the mounting of key F changedaccordingly, or many other changes may be made in the form and detailsof construction. I therefore do not Wish to be limited to the exactconstruction shown and described.

I claim as new and desire to secure by Letters Patent- 1. In afriction-clutch, the combination of external a-nd internal concentricfriction-surfaces; friction-straps adapted to contact with the surfaces;and means for applying a longitudinal pull to the end of the strap forthe external surface and a longitudinal thrust to the end of the strapfor the internal surface, substantially as specified.

2. In a friction-clutch, the combination of external and internalconcentric friction-surfaces; friction-straps adapted to contact withthe surfaces; a key mounted between the ends of the straps and having abearing in each; and means for operating the key to apply a pull to theend of the externally-applied strap and a thrust to the end of theinternally-applied strap, substantially as specified.

3. The combination in a friction-clutch of external and intern alconcentric friction-surfaces attached to one member of the clutch;friction-straps connected with the other member of the clutch andadapted to contact with the surfaces; a key mounted between the freeends of the straps with a bearing in each; and means for operating thekey to apply a pull to the end of the externally-applied strap and athrust to the end of the internally-applied strap, substantially asspecified.

4.. The combination in a friction-clutch of external and internalconcentric friction-surfaces attached to one member of the clutch;friction-straps connected with the other member of the clutch andadapted to contact with the surfaces; a key mounted between the freeends of the straps with a bearing in each; and a cone-shifter foroperating the key to apply a pull to the end of the externally-appliedstrap and a thrust to the end of the internallyapplied strap,substantially as specified.

5. The combination in a friction-clutch of external and internalconcentric friction-surfaces attached to one member of the clutch;friction-straps adapted to contact with the surfaces; beveled surfaceson the ends of the straps contacting with stops on the other member ofthe clutch; a key mounted between the free ends of the straps with abearing in each; and means for operating the key to apply a pull to theend of the externally-applied strap and a thrust to the end of theinternally-applied strap, substantially as specified.

6. In a friction-clutch, the combination of external and internalconcentric friction-surfaces attached to one member of the clutch;friction-straps adapted to contact with the surfaces; beveled surfaceson the ends of the straps contacting with stops on the other member ofthe clutch; and means for applying a pull to the free end of theexternally-applied strap and a thrust to the free end of theinternally-applied strap, substantially as specified.

7. The combination in a friction-clutch of surfaces c and c; straps Eand E adapted to contact therewith; key F mounted between the straps,having a permanent bearing in the end of one and a set-screw connectionwith the end of the other; and cone-shifter G for operating key F,substantially as specified.

8. The combination in a friction-clutch of surfaces c and c on pulley C;straps E and E adapted to contact therewith and having their endsprovided with beveled surfaces contact ing with stops on flange CZ; keyF mounted between the straps, having a permanent bearing in the free endof one and a set-screw connection with the free end of the other; andcone-shifter G for operating key F, substantially as specified.

MICHAEL R. CONWAY.

Witnesses:

ALFRED OSKAMP, BRAYTON G. RICHARDS.

